Fan pulley



Feb. 6, 11923. 1,444,302

A. A. BULL.

FAN PULLEY.

FI LED APR. s .1 920.

l@ l i llmatented Feb. 6, 1923i. y l llfllipliDZ E :arresv entrena toelaten. f

v4'Aiulntrn A. BULL, AoKFVDENROIA?, MICHIGAN, AssIGNoR 'To GENERAL morons CORPORA- TION, or DETROIT, MICHIGAN, A CORPORATION or DELAWARE.

y FAN vPULLJEY.

' Application led April 8, 1920. Serial No. 372,237.

AToU'ztzomf'it-may 009106171.' cooling system in the usual manner. The vBe 'it knownthatz I. ARTHUR A. BULL. a fan is bolted to a hub T. which Inav be cast subject of the King of Great Britain. and a or otherwise formed as desired, by ineans of resident of Detroit. countv ofi "ayne, and capfscrews 8 and is keyed to the shaft 9,

State of Michigan. have invented certa/in which supports the fan and pulley in a, suit- 60 newand'V usefull Improvements in Fan Pulable bearing,not shown.- A flange 10 on the leys; of which'the following is a full` clear. hub T forms one side of the pulley and/a concise. and exact description such asy will sleeve 11, preferably stamped fromsheet f enable'oithers skilled in the art to'which the metal havin v'another flange 12. ,forms the 10 invention relates to make and use the same, other side. n the stamped sleeve aref-two 65 reference being made therein to the accomopposite slots 13 and 14, disposedl at an panying drawings, which form a-part of angle to the plane ofrotation andso arthis specification. `ranged that the rotation of the member 11 This invention relates to'certain improvecauses longitudinal movementk thereof on 15 ments in pulleys, and although of general the hub due to the angular position of theY 70vv applicability whenever pulleys of this type slots.` @ne or more slots may be used,'but may be employed it is of especial utility in the preferred construction includes two, as connection with the pulleys used for drivbest shown in Figure 2. 'By rotating the ing fans which form part of the cooling apmember 11 in one direction the distance beparatus of an automobile power plant. tween the beveled edges"of the two flanges 75 It has heretofore been customary to ad- 10 and 12 is decreased. thereby causing the just the tautness ofthe belt on a. V type pulbelt to ride higher on the pulley and tightlev by screwing a movable member of the ening the belt. Rotating this member in the pulley from or toward the opposite side, opposite direction causes a loosening ofthe which is inherentl)v a slow process. The fan belt. Y

present invention aims to overcome this ob- In the hub T are two opposite guiding jection and to simplify the. construction and and securmg members shown as screws 15 the adjustment of th'belt by providing one and 16, which determine the movement of member of the pulley with a slotl or equivathe sleeve 11 b v passing through the slots lent means. and the other member with a 13 and 1&1. The angle of the slots may be 85 guide and clamping means adapted to coas greatas desired to provide for the necesoperate with said slot. This construction sal'y ad]ustment. The guides may be arenables the same results to be accomplished ranged to Screw into tapped holes in the as would be obtained in the old construction, hllb T. 0l'- Illfiv be Secured thereto in any and at the same time provides a structure other convenient manner. 90

which may be more easily and cheaply When the beltV becomes too loose it is sufmanufactured. fiCleIlt t0 11I1S CI`9 W thetWO guides which Other objects and advantages will more loosens the frictionally held sleeve 11, and

fully appear from the following descrip-d by a slight turn of this sleeve, the distance 4o tion; between the flanges decreases due to the 95 In the accompanying drawings; angularly disposed slots and causes the belt Figure 1 shows a side elevation of an int0 I'ldel higher on the pulley. The belt may ternal combustion enginehaving a belt. be IOOSencd turning the sleeve in the opdriven fan and thepulley which constitutes POSit@ dlrectlon and increasing the distance one embodiment of my invention adapted between the two flanges, thereby causingthe 1.0@

thereto, belt to ride lower on the pulley.

Figure 2 is a sectional view through the It Will be S9911 that the provision of slots. pulley and showing the belt comparatively dlSpOSfljit an angle t o the circumference 10W in the groove. and guiding and clamping means co-operat- Figure 3 is a view showing the pulley in lng therewith, a'ords means whereby a 105 elevation and the belt riding higher in the quicl, easy. and ellicient adjustment may be groove. due to the movement of the sleeve. obtalned and wheieb)v the cost of manufac- The drawings show a fan 4 driven by a ture may be materally reduced. belt-'5, adapted to be actuated b v an engine It will be understood that many changes 6 and arranged to operate as part of the in the details of construction of the pulley 110 and also of the guiding and adjusting means may be made by one skilled in the art without departing from the spirit of the invention, or from its scope as defined in the following claims. i

l. A fan pulley, comprising a hub having an inclined projection, a slee-ve rotatably and slidably mounted upon said hub and having an inclined projection, and an angular-ly disposed slot, a guide extending from said hub throughsaid slot in Said sleeve, and means engaging said sleeve. for clamping said sleeve in fixed relation to said hub.

2. A fan pulley, comprising a hub having an inclined lange, a sleeve slidable upon said hub and having an inclined {lange and a slot, and a threaded guide carried byv said hub, passing through said slot and adapted to clampthe sleeve to the hub.

` 3. An expansible pulley, comprising an inner member, an outer member slidably mounted von said inner member, Said mem bers provided With means adapted to cooperate to form a belt receiving groove with inclined sides, one of said members having a slot, and means on the other member cooperating vvith said slot, whereby said members may be adjusted and secured to vary the width of the groove.

4. A pulley comprising two members slidably mounted with respect to each other, said members provided respectively with means between which a belt may be received, one of said members having a slot and means fixed with respect to the other member cooperating with said slot'to permit relative adjustment of said members and secure them in adjusted relation.

5. A pulley comprising two members, so mounted as to becapable of relative rotative movement, said membersA provided respectively with means between which a belt may be received, one of said members having a slot, and the other having means co-operat ing with sadslotxvhereby relative rotation of said members will cause an adjustment of the distance betweensaid belt receiving means.

In testimony whereof I affix my signature,

ARTHUR A. BULL. 

